That said, what is necessary is to "revert" to the older version, and, more importantly, to recover the instruction pages.

1. You need permission from the original author, otherwise you are violating copyright.
2. No, the deletion did happen, those aren't the original addon. I had missed the fact that there were patches by someone else that had been uploaded to the main file and now that I am aware of them they will have to be removed as well.
3. ^^
4. ^^